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Product Specifications:
| Item | Screw Machine Drill Bit |
| Application | For Alloy, Tool And Stainless Steels, Cast Iron |
| Cutting Direction | Right Hand |
| Decimal Equivalent | 0.228 |
| Depth Dia. Ratio | 4Xd |
| Depth X Dia. Ratio | 4xd |
| Drill Bit Dimension Type | Wire |
| Drill Bit Grouping | Drill Bit |
| Drill Bit Material | Cobalt Steel |
| Drill Bit Point Angle | 135° |
| Drill Bit Point Type | Split Point |
| Drill Bit Size | #1 |
| Drill Dia. Tolerance | -0" to +0.0007" |
| Drill Length Class | Screw Machine Length |
| Drill Point Length | 0.0472" |
| Finish | Straw, Bronze |
| Finish-machining | Straw, Bronze |
| Flute Length | 1 5/16" |
| Flute Type | Spiral |
| Grade | Heavy Duty |
| Helix Angle | 28° |
| List Number | 559 |
| Material | Cobalt |
| Material Grade-machining | Grade M42 |
| Material-machining | Cobalt |
| No. Of Flutes | 2 |
| Overall Length | 2 7/16" |
| Primary Material Application | Cast Iron, Steel, Tool And Die Steel |
| Primary Material Application Iso Code | K, P |
| Shank Dia. | 0.234" , 15/64" |
| Shank Length | 1 1/8" |
| Shank Type | Straight |
| Shank Type-machining | Straight |
| Spiral Direction | Right Hand |
Shipping Info:
| Ship weight (kg) | 0.01 |
| Ship height (cm) | 3.81 |
| Ship length (cm) | 8.85 |
| Ship width (cm) | 2.54 |
| Country of Origin | US |
Product Variants
| Product | Model | Shank Dia. | Shank Length | Flute Length | Drill Bit Size | Finish-machining | Drill Dia. Tolerance | Finish | Drill Bit Material | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
![]() |
50857 | 0.219" | 1 1/8" | 1 5/16" | #2 | Straw, Bronze | -0" to +0.0007" | Straw, Bronze | Cobalt Steel | €11.12 | |
![]() |
50859 | 0.203" | 1 1/8" | 1 1/4" | #4 | Straw, Bronze | -0" to +0.0007" | Straw, Bronze | Cobalt Steel | €10.31 | |
![]() |
51819 | 0.344" | 1 5/16" | 1 11/16" | 11/32" | Tin | -0.001" to 0" | Tin | Cobalt | €32.94 | |
![]() |
50835 | 1/4" | 1 3/16" | 1 7/16" | F | Straw, Bronze | -0.001" to 0" | Straw, Bronze | Cobalt Steel | €12.93 | |
![]() |
50858 | 0.219" | 1 1/8" | 1 1/4" | #3 | Straw, Bronze | -0" to +0.0007" | Straw, Bronze | Cobalt Steel | €11.12 | |
![]() |
50850 | 3/8" | 1 5/16" | 1 13/16" | U | Straw, Bronze | -0.001" to 0" | Straw, Bronze | Cobalt Steel | €28.27 | |
![]() |
50915 | 0.047" | 7/8" | 1/2" | #60 | - | - | Straw, Bronze | Cobalt Steel | €5.45 |
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CHICAGO-LATROBE 50856 Screw Machine Drill Bit, #1 Size, 1 5/16 Inch Flute Length
€11.13 /unit



